package thread;
class Test {
    public int count = 0;
    public void add() {
        synchronized (Test.class) {
            count++;
        }
    }

    synchronized  public static void func() {

    }
}

public class ThreadDemo20 {
    public static void main(String[] args) throws InterruptedException {
        Test t = new Test();
        Object locker = new Object();
        Thread t1 = new Thread(() -> {
            for (int i = 0; i < 50000; i++) {
                t.add();
            }
        });
        Thread t2 = new Thread(() -> {
            for (int i = 0; i < 50000; i++) {
                t.add();
            }
        });
        t1.start();
        t2.start();
        t1.join();
        t2.join();
        System.out.println("count = " + t.count);
    }
}
